SAML2 autoconfiguration is not imported by @WebMvcTest

[gbaso]

I have an application configured with both OIDC and SAML2 authentication. When creating a test slice with @WebMvcTest the spring security configuration for OIDC is imported, while the configuration for SAML2 is not, therefore the tests don't work as expected.

The AutoConfigureMockMvc import list has org.springframework.boot.autoconfigure.security.oauth2.client.servlet.OAuth2ClientAutoConfiguration, but org.springframework.boot.autoconfigure.security.saml2.Saml2RelyingPartyAutoConfiguration is missing.

minimal sample: https://github.com/gbaso/web-mvc-test-saml2

[snicoll]

Closing in favor of PR #45650. Thanks @nosan!